Title: Analysis of flow and thermal characteristics of hybrid nanofluids within a microchannel under magnetic field

Authors: Hakan Türker; Elif Büyük Öğüt; Erman Aslan

Addresses: Institute of Sciences, Kocaeli University, TR-41380, Kocaeli, Turkey ' Department of Mechanical Engineering, Kocaeli University, TR-41380, Kocaeli, Turkey ' Department of Mechanical Engineering, Kocaeli University, TR-41380, Kocaeli, Turkey

Abstract: The study investigates the flow and thermal characteristics of microchannels with varying geometries and boundary conditions. Water is used as the base fluid, with Al₂O₃ and CuO nanoparticles as additives. The analysis begins with a straight microchannel, followed by comparisons with sinusoidal or sine wave-shaped channels. Additionally, the effects of a magnetic field on a straight microchannel are explored. The numerical simulations conducted using ANSYS Fluent software, cover Reynolds numbers (Re) of 100, 300, 700, and 1,000 in laminar flow, along with volume fractions of 1%, 2%, 3%, 4%, and 5%. A magnetic field intensity of 0.1T is applied for the magnetohydrodynamic (MHD) effect. The results presented as Nusselt numbers, pressure drop, and thermal performance factor graphs, indicate an increase in Nusselt number with rising Reynolds number and decreasing volume fractions. Pressure drop also rises with increasing Reynolds number and volume fractions.

Keywords: finite volume method; laminar flow; microchannel; nanofluid; magnetohydrodynamics; MHD; convective heat transfer; pressure drop.

DOI: 10.1504/PCFD.2025.143736

Progress in Computational Fluid Dynamics, An International Journal, 2025 Vol.25 No.1, pp.31 - 43

Received: 14 Jan 2024
Accepted: 23 Mar 2024
Published online: 06 Jan 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article